Dual Synchronous Step-Down DC/DC Converter
Linear Technology announces the LTC3417, a dual output, 4 MHz, synchronous buck regulator that delivers up to 1.4 A of continuous output current from one channel and up to 800 mA from the second. Using a constant frequency and current mode architecture, the LTC3417 operates from an input voltage range of 2.25 to 5.5 V, making it suited for single cell Li-Ion, multi-cell Alkaline or NiMH applications. It can generate two independent output voltages as low as 0.6 V, enabling it to power the latest generation of low voltage DSPs and microcontrollers. Its switching frequency of up to 4 MHz allows the utilization of tiny, low cost ceramic capacitors and inductors less than 2 mm in height. The combination of dual outputs, current mode architecture, tiny externals and a 5 × 3 mm DFN (or TSSOP-20E) package make the LTC3417 appropriate for a variety of applications. The LTC3417 uses internal switches with an RDS(ON) of only 0.088 Ω and 0.160 Ω to deliver efficiencies as high as 95%. The LTC3417EDHC is available in a DFN-16 package, and the LTC3417EFE is available in a thermally enhanced TSSOP package.
Linear Technology Corporation